Mechanical musical instrument.



R. PRUMSDORP.

MECHANICAL MUSICAL INSTRUMENT.

-APPLIOATIOH FILED nuns, 1908.

947,899. Patented Feb. 1,1910.

2 SHEETS-SHEET l.

Fig.2 c I, I 7% 7 Witnesses.

R. PRfiMSDORF.

MECHANICAL MUSICAL INSTRUMENT.

APPLICATION FILED KAY 13, 190B.

Patented Feb. 1, 1910.

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- piiiiaiiiiieiily line B- UNITED STATES PATENT OFFICE.

ROBERT I BfiMSDORF, OF LEIPZIG-EUTRITZSCH, GERMANY, ASSIGNOR TO THE FIRM. OF LUDWIG HUPFELD AKTIENGESELLSCHAFT, 0F LEIPZIG, GERMANY.

MECHANICAL MUSICAL INSTRUMENT.

panyih fittings, and to letters and figures of refelhoe marked thereon, which form a part'df this specification.

e perforated note sheets of various operated musical instruments are not ill of the'same dimensions nor are the perforations the same distances apart across the sheet. iiild ment to the use. of these di erently constru'cte'd sheets it has been in some cases custenants to use a plurality of tracker bars eag disconnected in various manners from the, suction mechanism when notpable v(if bei to be d.- best: tracker bars have been arrang" 'ebeh-ind the other or side by side.

The di iitions or canalization of these bars rife fliadein accordance with the particiilar dimensions of the note sheet to used.

Awarding. to the present invention I use a'singIe' tracker bar having a plurality of sets orlins of openings and capable of being shifted so as to bring any one of a number of sets of perforations into operative position and by doing so I have decreased considerably the cost of manufacture of these instruments. While the perforations or o nings in the tracker bnrmay be either 0 different size or difl'erent distances apart or both they are connected to the bottom of the bar in ii manner to register with a single se tlo f channels at their bases.

Referrin' to the drawings-in which like parts are similarly designated; Figure 1 is an elevation of the tracker bar; Fig. 2 is a sectioiias the line 24 of Fig. 1; Fig. 3 is an end view; 4 is a plan view of a bar showing two sets or lines, of holes; Fig. 5 is an elevation of another modification of the trackel bin"; Fig. 6 is a section on the line A-& ofF g's. 5, 8 and 9; and Fig, 6 isa sectionlon the same line, but with the base in shifted gpsition. Fig. 7 is a section on the of the Figs. 5, 8 and It; and Fig.

iii order to adapt an instru-v Specification of Letters Patent.

Application filed May 18, 1908.

base in shifted Patented rev. 1, 1910. Serial No. 433,422.

is a section on the same line, but witltthe position. Fig. 8 is a section on the line C-U of Fig. 5, and Fig. 9 is a top plan view of the channel block, the base living ren'ioved.

sists of In Figs. 14 the tracker bar proper cona crown a and a base 6. The crown being in the present instance provided with two sets of holes a d which are connected respectively The base 6 is mounted to slide member or block 6 provided or to the base 5.

on a channel with channels openings f leading to the usual ton'e genhy pipes c d crating mechanism. Between the-based and 0 block e we provide a suitable packing g order to make a ti ht joint between" bjaiid and the articu ar form of l which I pre or to use is the soft eathe'r;

At each end of the baseb I provide blocks-I or depending ears or the equivalent b and these cars I mount pins Z. At each end of the block e I provide asuitable base ain which are mounted ,5 links it and h depending ears or lugs b.

pivots m and y'eohficted to pivots w and a on the Theselinks h so and h are inclined and have subsiiln'tially the same inclination and direction so tha't.

the base b will be connected by links it and h and their pivots.

w h a e 1',

formed by the v p .85

One of the pivots 1 is formed as affecmeans of aparallel motion t-uating shaft 2 extending along the block a snmlar its opposite end where it is connected to a parallel motion. The link h is rigidly 'eonneeted to this shaft, for example, by

pin 5'.

The shaft is oscillated by any suitable mechanism for example a handle or lever k. shaft 2' the links in bar will be moved By moving the lever is to rock the and h and the tracker into the dotted position shown in Fi 3 thereb Y lifting the tracker bar slightly rom the b oek c andmoving it laterally and down again on to the block e throwing the set of openings 0 out of register with the channels in the block 0 and simultaneouslv bringing the openings d into reg ister therewith.

tightly in secured a block 6.

In order to hold the tracker bar air position I provide a leaf spring m t its center by a screw 2 to the The free ends of this sprin take or the pins Z and thereby hold the ass 6 down on to the-block e.

In the modification shown in the Figs.

59 the base 6 is mounted to slide in a 'the channels f in the block a, while the con- 2. The combination with a channel member of a tracker bar having a plurality of sets of openings in its crown, a base, means to connect these openings with the base to be capable of registering with the channels in the channel member, and mechanism to longitudinally shift the-tracker bar to bring any one of the sets of openings into registra- {)ion with the channels in the channel mem- 3. The combination with a tracker bar having a crown provided'with a plurality of sets of openings, the openings of each set; being dififerent distances apart, a base, means to connect the openings of each-serie's with the base, a channel block and a longitudinal motion device to move the tracker bar to. bring any one of sets of openings into reg ister with the channels in said block.

4. The combination witha' tracker bar having a crown sets of openings, a perforated base, and ncans to connect the openin of each set in the crown with'the perforations in the-base; of a block having sets of'air passages therein and its upper facejhaving a longitudinal channel in which the said base lilo of sliding. J

5. The .combination witl h 1 alter bar having acrown providedwith'a plurality of sets of openings, a perforated ba's means to connect the openings of each ser es with the perforations 1n the base, a block having a set of air passages thereinonwhicli the base is capable-of sliding and ai -lever pivoted, to

"the block, and havin a'slot thereimaanda 1 f o enings pin engaging'said slot and sectiredin the The number of holes and channels in the base, tolongxtudinally'slide the traekerbar base I) or.sets,.of holes or channels and the i th blOCk t Connect j fi j Set Of block 6 may be altered in a convc'nient manopenings in the crown with the an' passages nan in the block. i

I claim 1. The combination .with a. channel mem- 1 her, of a tracker bar having a plurality of sets of openings and mechanisms to longh tudinall v shift. the tracker bar to register" with any one of the sets of openings of the channel member.

longitudinal direction on the channel inem r her or block 6. The block (2 is provided on the upper side with a number of holes or channe s f f and f f corresponding to the number of holes 0 and d in the base I). The holes in the base b and the block 6 l are arranged in such a manner, that in the one ositionof the base 1) shown in section in Figs. 6 and 7 the ho' s 0 correspond with nection between the holes d in the base I) and the channels f in the block e is intern the other position of the parts shown in Figs. 6 and 7 the holes d ,in the base 6 corl res )ond with the channels f in the block 6 l an the connection between the holesc in'the base L andthe channels f in the block 6 is interrupted. The channels f in the block! are led in the channels of the same, leading l to the usual tone generating mechanisms.

The mechanism to shift the tracker bar to g register any one of the sets of openings with t the channel member consists of a lover 1 conl nected by a pivot 2 with the block c and having a longitudinal opening 3.

n the o ning 3 slides the pivot 4 connected wit 1 the base 6. By moving the lever 1 the tracker bar is brought in' the positions showin'in Figs. 6 or 7 and the one or other set of openings in the crown a is l brought in connection with the tone gener- 1 ating mechanisms.

In the modificationshown in Figs. 59 it, is not neccssarythat the openings in the base b have the same distance-in the several my invention, 1 have signed my name in pre ence of two subscribing witnesses.

ROBERT FROMSDORF. \Vitncsses: K

1* MIL GEUDTNEII, Rnnorr r FRICKE.

Tn testimony that I claim the foregoing as provided With n plurality of 

